The TD301/TD303 are field measurement instruments for measuring temperature and level (pressure) in oceans, lakes, tanks, groundwater, rivers, R.O.V/A.U.V., etc.

All settings such as measurement intervals, real-time clock, etc., are accessible. They are programmable via the menu, and calibration coefficients are stored in non-volatile EEPROM memory and will not be altered or lost in case of power failure.

The TD301 model features a replaceable internal battery for standalone recording applications. On/off control is achieved either by a magnetic switch or from the keypad. The TD303 model is designed for online applications with an external power supply and has the additional feature of 5 Hz sampling with programmable output formats compatible with the host unit. Both units feature a built-in “loop memory” where the oldest data is overwritten as the memory fills up. Data is recorded in physical units and simultaneously transferred online via a waterproof RS232 input/output connector.

Complete integrity and protection against leaks are achieved through electronic vacuum casting and other components encapsulated in solid polyurethane. A comprehensive computer program with units for easy communication, programming, and data presentation/processing is provided.

For remote retrieval and monitoring, the manufacturer offers several options: the CU901 communication unit, for two-way communication via Iridium satellite, GPRS with an embedded web server, GSM, and UHF/VHF.